I'm given vegetable: for gut response? (7)
I believe the answer is:
impulse
'gut response?' is the definition.
(I've seen this in another clue)
'i'm given vegetable' is the wordplay.
'given' says to put letters next to each other.
'vegetable' becomes 'pulse' (pulse is a kind of vegetable).
'im'+'pulse'='IMPULSE'
'for' is the link.
(Other definitions for impulse that I've seen before include "Impetus - whim" , "Catalyst" , "Sudden urge to do something" , "Miles up (anag)" , "A sudden inclination to act (7)" .)